Ingredients

• For the sponge:
• 1 cup fed sourdough starter
• 1 1/2 cups lukewarm water
• 3 cups all-purpose flour
• For the dough:
• 1 tablespoon granulated sugar
• 2 1/4 teaspoons salt
• 2 cups bread flour
• 1 tbsp . water optional
• To finish:
• 1 tbsp egg white lightly beaten with 1 tbsp water
• water in a spray bottle

Directions

1. n a large mixing bowl or the bowl of an electric mixer, combine the starter, water, and all-purpose flour. Mix together with a fork or wooden spoon until smooth. Cover with plastic wrap and let sit at room temperature for 4 hours.

2. Transfer the bowl to the refrigerator and chill overnight, at least 12 hours.

3. Remove the bowl from the refrigerator and add the sugar, salt, and bread flour to the sponge. Mix until a ball of dough begins to come together. If some of the dry ingredients will not incorporate into the dough, add the additional 1 tablespoon of water to moisten them. Continue kneading the dough (on low speed if using an electric mixer) until the dough is smooth and elastic, about 5-6 minutes. Form the dough into a ball and transfer to a large lightly oiled bowl, turning the dough once to coat in the oil. Cover with plastic wrap and let rise in a warm spot until doubled in volume, 3-4 hours.

4. Line a baking sheet with a silicone baking mat or parchment paper. Transfer the dough ball to a lightly floured work surface and gently deflate the dough. Divide the dough into eight equal portions. Form each piece of dough into a ball, and tuck any loose edges or seams underneath. Place seam-side down on the prepared baking sheet. Repeat shaping with the other 7 pieces of the dough. Transfer the shaped boules to the prepared baking sheet. Cover loosely with lightly oiled plastic wrap. Let rise in a warm place until nearly doubled in volume, about 2-3 hours.

5. Place a baking stone or large dutch oben in the oven and preheat the oven to 425? F. Allow the pot to preheat for at least 20 minutes. Just before baking, lightly slash the top of each boule using a sharp serrated knife. Brush the exposed surface of the loaves with the egg wash. Spray the loaves lightly with water. Slide the entire baking sheet onto the baking stone or carefully place 4 boules in the dutch oven with the top on. Bake about 28-32 minutes, rotating the pan halfway through baking, until the crust is golden brown. If baking with the dutch oven repeat once the first four have been baked. Transfer the finished boules to a wire rack and let cool at least 30 minutes before slicing and serving.

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